User's Manual Part 2

ADCP-75-348 • Issue 1 • 04/2008

Page 26

A three position terminal block is provided for connecting the power wires. The power is fed to

the HU Power Supply module through a connector located on the front of the unit. Power to the

HU must be supplied through a fuse panel such as the 20 position PowerWorx GMT Fuse Panel

(available separately) and the power must be protected with a 15 Amp GMT fuse.

Use the following procedure to install the power wiring:

1. Obtain the items listed below:

• Wire stripper and screwdriver

•Wire,

#18 AWG (1.00 mm) red and black insulated copper wire

. Recommended wire size

for the power leads, when fused in the same bay.

Turn power switch on power supply OFF.

3. Connect the wires to the designated terminals on the fuse panel.

4. Dress and secure the wires to the rack following local practice. Route wiring away from

sharp edges and secure in place to prevent chaffing and provide strain relief.

5. Route the wires to the terminal block (Figure 19) on the HU Power Supply and cut them to

length, allowing sufficient length for termination.

6. Loop both power wires around and through the Ferrite as shown in Figure 19.

7. Strip 1.27 cm (0.5 inch) of insulation from the end of each wire.

8. Insert one end of each wire into the terminal block, one into + and the other into the – position.

9. The terminal block must plug into the three-pin receptacle on the front of the HU Power

Supply.

10. Install fuses in the fuse panel. Update office records as required.

11.

Turn power switch on power supply ON.

12. The procedure for checking the voltage level and verifying that the HU is ready to power up

is provided in the applicable System Operation and Maintenance Manual (see Related

Publications section).

Note: All DC input wiring should be routed away from any sharp edges and properly

secured in place to prevent chafing and to provide strain relief. This may be achieved by

tie-wrapping wires to the rack frame or by a similar means.

Note: When connecting the equipment to the supply circuit, be sure to check equipment

nameplate ratings to avoid overloading circuits which may cause damage to over-current

protection devices and supply wiring.